diff --git a/kfet/static/kfet/js/history.js b/kfet/static/kfet/js/history.js
index 291c106d..7deb407d 100644
--- a/kfet/static/kfet/js/history.js
+++ b/kfet/static/kfet/js/history.js
@@ -1,3 +1,22 @@
+class History {
+    
+    constructor() {
+        this.templates = {
+            'operation': '<div class="ope"><span class="amount"></span><span class="infos1"></span><span class="infos2"></span><span class="addcost"></span><span class="canceled"></span></div>',
+            'opegroup': '<div class="opegroup"><span class="time"></span><span class="trigramme"></span><span class="amount"></span><span class="valid_by"></span><span class="comment"></span></div>',
+            'day': '<div class="day"><span class="date"></span></div>',
+        };
+
+        this._$container = $('#history');
+        
+        this.list = new OperationList();
+        this.api_options = {
+            'from': moment().subtract(3, 'days').format('YYYY-MM-DD HH:mm:ss'),
+        };
+    }
+}
+
+
 function KHistory(options={}) {
     $.extend(this, KHistory.default_options, options);